A general synthetic route towards gamma- and delta-lactones. Total asymmetric synthesis of (-)-muricatacin and the mosquito oviposition pheromone (5R,6S)-6-acetoxy-hexadecanolide.
Ea. Couladouros et Ap. Mihou, A general synthetic route towards gamma- and delta-lactones. Total asymmetric synthesis of (-)-muricatacin and the mosquito oviposition pheromone (5R,6S)-6-acetoxy-hexadecanolide., TETRAHEDR L, 40(26), 1999, pp. 4861-4862
Five (or six) membered asymmetric lactones are synthesized from gamma-butyr
olactone (or delta-valerolactone) in a straightforward way using the follow
ing reaction sequence: reduction, Wittig-Schlosser coupling, Sharpless asym
metric dihydroxylation, oxidation and lactonization. Thus, (-)-muricatacin
is synthesized in six steps (43 % overall yield). Furthermore, (5R,6S)-6-ac
etoxy-hexadecanolide is prepared in eight steps (38 % overall yield) via a
carbonate ester, utilizing a novel lactonization with inversion of stereoch
emistry. (C) 1999 Elsevier Science Ltd. All rights reserved.